This guide involves downgrading your Vivo Themes app to an older version that supports custom fonts and themes. Newer versions (7.0 and above) block custom content, so we need to go back to an older version.
Why Downgrade?
- Themes app version 7+: Blocks all custom themes and fonts
- Older Themes versions: Allow custom themes and fonts to work
- The Problem: Vivo intentionally removed custom font support in newer updates
How It Works
zFont 3 will:
- Check your current Themes app version
- Find a compatible older version for your device
- Create a special script to downgrade your Themes app
- Help you run the script using different methods
Methods to Run the Script
You have 2 main options to downgrade:
Option 1: ADB (No Root Required)
What is ADB? A tool that lets you control your phone from a computer or special apps.
Ways to use ADB:
- Computer: Install ADB tools on Windows/Mac/Linux
- Android Apps: Brevent, ADB OTG, Bugjaeger
- zFont 3: Uses Shizuku to run ADB automatically
Option 2: ROOT (Full Access)
What is ROOT? Full admin access to your phone's system.
- Can downgrade any app
- Works on all Android versions
- Requires rooted phone
Important Limitations
Android 13+ Restrictions
- Android 13 and newer: Google blocked ADB from downgrading system apps
- ADB methods won't work on Android 13+
- ROOT still works on all Android versions
What This Means:
- Android 12 and older: ADB methods work fine
- Android 13 and newer: You MUST have ROOT access to downgrade
If Downgrade Doesn't Work
Alternative Method
If you can't downgrade Themes app to version 6.8.1.1 or earlier:
- Try the File Manager & Documents method (see other guide)
- This method may work on some devices
- Success is not guaranteed
Not Our Fault
Please understand:
- zFont 3 is just a tool - it doesn't create the restrictions
- Vivo intentionally blocks custom fonts in newer versions
- This is Vivo's decision, not a problem with zFont
- Don't leave negative reviews asking for "old zFont back"
- The old zFont app can't work either due to the same Vivo restrictions
Troubleshooting
Downgrade Fails
- Your Android version might be too new (13+)
- Try the ROOT method if available
- Consider the File Manager method instead
Need Help?
- First: Check your Android version - ADB only works on Android 12 and older
- Second: Make sure you followed all setup steps correctly
- Third: Try different ADB apps or methods
- Last: Consider asking Vivo to officially support custom fonts again
Remember
The best solution is to contact Vivo and ask them to bring back official custom font support in their Themes app.